Bouene



(No Model.) I 3 SheetsSheet 1.

R. W. SHELBOURNE.

SAW MILL HEAD BLOGK.

No. 305,538. Peteeted Sept. 23, 1884.

WITNESSES ATTORNEYS.

(No Model'.) Y

R. W. SHELBOURNE.

3 Sheets-Sheet 2.

SAW MILL HEAD BLOCK.

INVENTOR I WITNESSES @7 flarw d TORNEYS.

(Nb Model.) 3 Sheets-"Sheet 3.

R. W. SHELBOURNE.

SAW MILL HEAD BLOCK.

Patent ed Sept. 23, 1884.

INVENTOR:

6 w WM ATTORNEYS.

WITNESSES 06m N. PETERS PhnltrLilIlcgruphm, Waihm lon. n C.

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ROBISON W. SHELBOURNE, OF BLANDVILLE, KENTUCKY, ASSIGNOR, BY MESNEASSIGNMENTS, TO WILLIAM OSCAR SHELBOURNE, MARY ANN SHELBOURNE, ROBERT E.LEE SHELBOURNE, BELLE BOYD SHELBOURNE, JOHN MOREAU SHELBOURNE, JOSEPHMARION SHELBOURNE, AND ALGERNON SIDNEY SHELBOURNE, ALL OF SAME PLACE.

SAW-MILL HEAD-BLOCK.

SPECIFICATION forming part of Letters Patent No. 305,538, datedSeptember 23, 1884.

Application filed Jae 7,1883. (No model.)

To all whom it may chm/eerie.-

Be it known that I, RoBIsoN W. SHEL- ZBOURNE, of Blandville, in thecounty of Ballard and State of Kentucky, have invented certain new anduseful Improvements in Saw- Mills, of which the following is a full,clear, and exact description.

This invention pertains to improvements in head-blocks for saw-mills,having for its ob- 1o ject to effect the manipulation of the log inpresenting it to the saw; and it consists of the several hereinafterdescribed and claimed co1n- 'binations and arrangements of parts.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view of a saw-mill with apparatus arranged accordingto my invention, for the purposes above specified. Fig. 2 is a sideelevation of the saw and its gear and part of the log-carriage. Figs. 3and 4. are details of the apparatus for setting the log up to the saw.Fig. 5 is alongitudinal section of the log-carriage with head-blocks online 00 a; of Fig. 1, and Fig. 6 is a trans- Verse section on line y yof Fig. 1.

The saw a is arranged on the mandrel I), having bearings in thesaw-frame c, and is to be driven by a belt from the engine and runningon a pulley, to be applied to the mandrel as commonly arranged. Motionis com.- municated to the shaft d, that feeds up and draws back thelog-carriage e, by the frictionwheel f for feeding and the wheel 9 forrunning back, the latter being geared directly with the mandrel b by thefrictiolrwheel h,

and wheel f being geared with said mandrel by a belt and pulleys, (notshown, but as commonly arranged,) and these two wheels f and 9 beingconstantly running, so that the shaft d is turned forward or backward,according to which way the carriage e is to run, by shifting wheel 6 onshaft d into contact with one or the other, f or g, for which purposethe bearing of shaft cl at j is in practice arranged to shift on thebeam of frame 0 by alever to be worked by the sawyer. The shaft (1 worksthe log-carriage e by the pinion 7c and rack 1. Thus far the apparatusis the same as in common use.

For working the shaft m, by which the knees n of the head-blocks h aremade to slide forward on the head-blocks to set the logs up to the saw,and for shifting them back preparatory to turning the log or to makeroom for a new log, I have geared said shaft, with a short shaft, 0,crossing the carriage and carrying the wheel, consisting of two rims, pand q. The rim 1) is for setting the log up to the saw by running for ashort distance on the rail 8, so as to be turned by it in the first partof the feed-motion of the carriage, to set the log up before it reachesthe saw. This rail 8 must be so arranged that when the log is set up tothe saw its contact with the rim 1) will cease, and contact must notoccur when the log runs back, and the period of contact must varysuitably for setting the log up more or less, according to the thicknessof the material to be sawed..- The rail is therefore made to rise andfall by the sliding bar t and links a in the following manner: The barit rests on rollers w in the posts 00, and it is connected by link ywith a rockshaft, 2, on which there is a toothed segment, a", thatgearswith the rack b on the beam 0 of the head-block nearest the saw.When the rack 1) comes in contact with segment a which is then restingin a position to the left hand of that in which it is represent- 7 ed inFig. 3, and turns to the position in which it is shown, said segment a"pulls bar t to the left and raises rail 3 high enough to producesufficient pressure on wheel-rim p to cause it to turn and move the logforward as long as segment a is held in the position represented by therack I), which continues until the rack escapes from the segment, whenthe weight (1 reverses the bar and allows the rail 3 to drop. The lengthof the rail 3 is to be sufficient to set for the thickest pieces to besawed-say six inchesand for setting to that extent'its position must besuch that rim will run the whole length on it before it drops, and forsetting to any thickness less the rail must drop before the rim p runsto the end of it. For this purpose the rail 8 is placed in a groovedsupport, to which the links a are connected, and the rail is geared by arack, 9 with a pinion, h on a shaft, y, with which the hand-wheel 2' isconnected, and the gearings are proportioned so that one turn of thehand-wheel will move the rail 8 its length, which length, as beforestated, is sufficient to set the log up six inches. The wheel 1' istherefore to be graduated on the basis of a sixinch set of the log to afull turn of the wheel, and a pointer is to be provided, whereby therail may be set to any desired extent less than six inches, which is tobe done by shifting the rail 8 to the right hand, so that rim p reachesit later in the traverse of the rack I) along the segment a and thustraverses less of the length of the rail before the rail drops by theescape of the rack 11 from segment a, and the consequent reversemovement of bar it. rail ,9, being down when the'log-carriage runs back,willnot have any effect on the rim 1),

1 and the rack 12 runs back over thesegment a which is merely pressedagainst the rack by the spring 0 that is employed to hold it up forengaging said rack when it goes forward.

' To prevent the thumping of the teeth of the segment against those ofthe rack after the segmenthas run out of gear with the rack, and,

before the escape of the segment on the forward or feeding movement ofthe carriage, and while the rail 8 is being held up by the segment, therack b" is constructed with a plain face, jhand the segment a has aneccentric face, If, which is a little thicker at the corner Z? than thelength of the teeth, to bear on face 9' and keep the teeth apart.

The head-block knees n are now slid back a little in order that the logmay be pushed back on the head-blocks,so that the corner on which thelog turns may be set back of the ends of 'the head-blocksover which thelog projects a little as it stands when the board has been cut off, andwhich would prevent it from turning properly; and to accomplish this Ihave provided a'rail, W, to be raised under the rim q when vthe carriageruns back by the foot-lever o and links 19 The pinion w which operatesthe adj ustingrack of of the cant-hook it is geared by a universaljoint, 3 with a telescopic extensionshaft, 2 which is coupled at itsother end by a universal joint, a, with awheel, I), mounted f in thehead-block at the head of the carriage,

(the head-block to which the hook is attached being the next,)with whichwheel I) a long pinion, 0, is caused to gear when the cant-hook is to beworked by swinging up its supporting-' frame (1* by the crank e, fromwhich an arm, f and rod 9 extend to the crank-shaft h, which is workedby the sawyerslever z'. The support- The and from each other for shortor long logs, and

the pinion 0 which is geared with the feed shaft 1) by the jointed shaftis and the bevelwheel Z, is made long in order that wheel b will gearwith it for turning the log, although the carriage may vary at times asto thepoint when it stops, said wheel I) being on the carriage, andpinion 0 being supported on the floor-timbers.

Ihereby reserve the right to embody and make claim in a separateapplication or applications for the log-turning devices and any otherdevices shown and described but not claimed in this application. a

Having thus described my invention, I claim as new and desire tosecureby Letters Patent 1. In -a saw-mill head-block, the combination,with the head-block and the log-setting shaft, of the wheel with itsshaft gearing with the log-setting shaft, the rising and falling railadapted for contact with the wheel, and the endwise-rnovable bar linkedto the said rail and to a segmental rack capable of engage ment with anddisengagement from the headblock, and of actuating the endwise-movablebar, said bar having automatic movement when released from the action ofthe segmental lfoar, substantially as and for the purpose set orth.

2. In a saw-mill head-block, the combina tion, with the log-carriage andthe log-settingshaft, of the wheel with its shaft gearing with thelog-setting shaft, the rising and falling rail adapted for contact withthe wheel, and the endwise-movable weighted bar linked to the rail andto a segmental rack capable of engagement with and disengagement fromthe head-block, and of actuating the endwise-- tion, with thelog-carriage and the log-setting shaft, of the Wheel having a greaterand a lesser rim and with its shaft gearing with the aforesaid shaft,the rising and falling rail adapted for contact with the wheel, theendwise-movable weighted bar linked to the rail 'and to a segmental rackcapable of engagement with and disengagement from the headblock and ofactuating the endwise-movable bar, and the pivoted bar arranged in aplane above the rail, and adapted for contact with the lesser rim of the'wheel while its greater rim is still in contact with the rail,substantially as and for the purpose set forth.

4. In a saw-mill head-block, the combination, with the log-carriagee,the log-setting shaft m, and the head-block 0 having the rack if, of thewheel 19, with its shaft ogearing with the log-setting shaft m, the railt,

suspended by links at u, and having a re- 5 tracting-weight, d at oneend, and connected at its other end to the shaft 2, the setting-rail s,and segmental rack a, substantially as and for the purpose set forth.

5. In a saw-mill head-block, the combination, with the log-carriage e,the log-setting shaft m, and the head-block 0', having the rack b andthe blank portion j, of the wheel p,with its shaft 0 gearing with thelog-setting shaft m, the rail t, suspended by links a u, and having aretracting-weight, d and connected to the shaft z, the setting-rail s,the segmental rack a having the blank portion k thickened at P, andthespring 0 substantially as and for the purpose set forth,

6. In a saw-mill head-block, the combination, with the log-carriage e,the log-setting shaft m, and thehead-block 0, having a rack, b of thewheel 1), with its shaft 0 gearing with the log-settin g shaft m, thelink-suspended rail is, having the retracting-weight dfland connected tothe setting-rail s, the segmental rack a shaft z, and the raok-bargsecured to the rail 3, and engaged by the pinion h of the shaft y",engaged by the hand-Wheel shaft i substantially as and for the purposeset forth.

7. In a saw-mill head-block, the combination, with the log-carriage e,log-setting-shaft m, and the head-block 0 provided with a rack, I), ofthe Wheel having the greater rim 5 p and lesser rim q, and with itsshaft 0 gear ing with the log-setting shaft m, the link-suspended railt, having the retracting-weight d, and connected to the setting-rail s,the shaft .2, the segmental rack a and the rail 1?,

supported upon the links bfland having the p p 6 of the wheel having therims p q, and its shaft 0 gearing with the log-setting shaft m,link-suspended rail t, having the retractingwcight (Z and connected tothe setting-rail s and to the shaft z of the segmental rack a spring 0connected to the segmental rack, said rail 8 having the rack g engagedby the pinion h on the shaft y, geared to the shaft Z and the rail nmounted upon links p above the plane of movement of the rail s,andconnected to the foot-lever or treadle 0 substantially as and for thepurpose set forth.

9. In a saw-mill head-block, the head-blocks mounted on thelog-carriage, and one having a cant-hook with its adjusting-rack gearinginto a pinion, in combination with a shaft coupled to the shaft of saidpinion and to a gear-wheel mounted in one head-block and gearing into apinion whose shaft is coupled by shafts and pinions with thedriving-shaft, substantially'as and for the purpose set forth. I ROBISONW. SHELBOURNE. Witnesses: I

' M. T. SHELBOURNE,

L. O. RAY.

